package test3;

//测试生产者消费者问题2:信号灯法,标志位解绝
public class TestPc2 {
    public static void main(String[] args) {
        TV tv = new TV();
        new Thread(new Player(tv)).start();
        new Thread(new Watcher(tv)).start();
    }
}

//生产者-->演员
class Player extends Thread {
    TV tv;

    public Player(TV tv) {
        this.tv = tv;
    }

    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            if (i % 2 == 0) {
                this.tv.play("play111:" + i);
            } else {
                this.tv.play("play222:" + i);
            }
        }
    }
}

//消费者-->观众
class Watcher extends Thread {
    TV tv;

    public Watcher(TV tv) {
        this.tv = tv;
    }

    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            this.tv.watch();
        }
    }
}

//产品-->节目
class TV {
    // 演员表演,观众等待
    // 观众观看,演员等待
    String voice;// 表演节目
    boolean flag = true;// 标志位

    // 演员表演
    public synchronized void play(String voice) {
        if (flag) {
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("Player play:" + voice);
        // 通知观众观看
        this.notifyAll();
        this.voice = voice;
        this.flag = !this.flag;
    }

    // 观众观看
    public synchronized void watch() {
        if (flag) {
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("watcher watch:" + voice);
        this.notifyAll();
        this.flag = !this.flag;
    }
}
